Class K [Member] Annual Fund Operating Expenses - Class K [Member] - BLACKROCK BALANCED FUND, INC. |
May 31, 2025 |
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| Prospectus [Line Items] | ||||||
| Fee Waiver or Reimbursement over Assets, Date of Termination | June 30, 2027 | |||||
| Class K Shares | ||||||
| Prospectus [Line Items] | ||||||
| Management Fees (as a percentage of Assets) | 0.42% | [1] | ||||
| Distribution and Service (12b-1) Fees | 0.00% | |||||
| Other Expenses (as a percentage of Assets): | 0.05% | |||||
| Acquired Fund Fees and Expenses | 0.01% | [2] | ||||
| Expenses (as a percentage of Assets) | 0.48% | [2] | ||||
| Fee Waiver or Reimbursement | (0.01%) | [1] | ||||
| Net Expenses (as a percentage of Assets) | 0.47% | [1] | ||||
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